kexec: fix typo

* kexec.c (print_kexec_segments) [SUPPORTED_PERSONALITIES == 1]: Fix typo.
diff --git a/kexec.c b/kexec.c
index 9c675cc..e201937 100644
--- a/kexec.c
+++ b/kexec.c
@@ -43,10 +43,10 @@
 #else
 	struct kexec_segment seg;
 # define sizeof_seg sizeof(seg)
-# define seg_buf seg.seg_buf
-# define seg_bufsz seg.seg_bufsz
-# define seg_mem seg.seg_mem
-# define seg_memsz seg.seg_memsz
+# define seg_buf seg.buf
+# define seg_bufsz seg.bufsz
+# define seg_mem seg.mem
+# define seg_memsz seg.memsz
 #endif
 	unsigned int i, failed;